UFO Sighting in Greenwich, Connecticut on 2018-05-21 04:45:00 – Appears stationary like a large flashing disco ball just before sunrise in southeast

At 4:45 a.M. for about 15 minutes before sunrise, there was a large flashing light like a big disco ball in the southeastern sky moving like a large helicopter in the dark. it then went dark. possibly one of the local helicopter companies are testing a new aircraft of some sort.